Deep imaging of the shell elliptical galaxy NGC3923 with
MegaCam

J 2016

Deep imaging of the shell elliptical galaxy NGC3923 with MegaCam

BILEK, Michal, JC. CUILLANDRE, S. GWYN, Ivana EBROVA, Kateřina BARTOŠKOVÁ et. al.

Basic information

Original name

Deep imaging of the shell elliptical galaxy NGC3923 with MegaCam

Authors

BILEK, Michal (203 Czech Republic, guarantor), JC. CUILLANDRE (250 France), S. GWYN (124 Canada), Ivana EBROVA (203 Czech Republic), Kateřina BARTOŠKOVÁ (203 Czech Republic, belonging to the institution), Bruno JUNGWIERT (203 Czech Republic) and Lucie JÍLKOVÁ (203 Czech Republic)

Edition

ASTRONOMY & ASTROPHYSICS, LES ULIS CEDEX A, EDP SCIENCES S A, 2016, 1432-0746

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10301 Atomic, molecular and chemical physics

Country of publisher

France

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 5.014

RIV identification code

RIV/00216224:14310/16:00093056

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1051/0004-6361/201526608

UT WoS

000373207800089

Keywords in English

galaxies: peculiar; galaxies: elliptical and lenticular; galaxies: individual: NGC 3923; galaxies: photometry; techniques: image processing; gravitation

Abstract

V originále

Context. The elliptical galaxy NGC3923 is known to be surrounded by a number of stellar shells, probable remnants of an accreted galaxy. Despite its uniqueness, the deepest images of its outskirts come from the 1980s. On the basis of the modified Newtonian dynamics (MOND), it has recently been predicted that a new shell lies in this region. Aims. We obtain the deepest image ever of the galaxy, map the tidal features in it, and search for the predicted shell. Methods. The image of the galaxy was taken by the MegaCam camera at the Canada-France-Hawaii Telescope in the g'-band. It reached the surface-brightness limit of 29 mag arcsec(-2). In addition, we reanalyzed an archival HST image of the galaxy. Results. We detected up to 42 shells in NGC3923. This is by far the highest number among all shell galaxies. We present the description of the shells and other tidal features in the galaxy. A probable progenitor of some of these features was discovered. The shell system likely originates from two or more progenitors. The predicted shell was not detected, but the new image revealed that the prediction was based on incorrect assumptions and poor data.

Links

MUNI/A/1110/2014, interní kód MU

Name: Pokročilé problémy astrofyziky, teoretické fyziky a fyzikálního vzdělávání

Investor: Masaryk University, Category A

Citovat

BILEK, Michal, JC. CUILLANDRE, S. GWYN, Ivana EBROVA, Kateřina BARTOŠKOVÁ, Bruno JUNGWIERT and Lucie JÍLKOVÁ. Deep imaging of the shell elliptical galaxy NGC3923 with MegaCam. ASTRONOMY & ASTROPHYSICS. LES ULIS CEDEX A: EDP SCIENCES S A, 2016, vol. 588, April, p. "nestrankovano", 12 pp. ISSN 1432-0746. Available from: https://dx.doi.org/10.1051/0004-6361/201526608.

@article{1368683,
   author = {Bilek, Michal and Cuillandre, JC. and Gwyn, S. and Ebrova, Ivana and Bartošková, Kateřina and Jungwiert, Bruno and Jílková, Lucie},
   article_location = {LES ULIS CEDEX A},
   article_number = {April},
   doi = {http://dx.doi.org/10.1051/0004-6361/201526608},
   keywords = {galaxies: peculiar; galaxies: elliptical and lenticular; galaxies: individual: NGC 3923; galaxies: photometry; techniques: image processing; gravitation},
   language = {eng},
   issn = {1432-0746},
   journal = {ASTRONOMY & ASTROPHYSICS},
   title = {Deep imaging of the shell elliptical galaxy NGC3923 with MegaCam},
   volume = {588},
   year = {2016}
}

TY  - JOUR
ID  - 1368683
AU  - Bilek, Michal - Cuillandre, JC. - Gwyn, S. - Ebrova, Ivana - Bartošková, Kateřina - Jungwiert, Bruno - Jílková, Lucie
PY  - 2016
TI  - Deep imaging of the shell elliptical galaxy NGC3923 with MegaCam
JF  - ASTRONOMY & ASTROPHYSICS
VL  - 588
IS  - April
SP  - "nestrankovano"
EP  - "nestrankovano"
PB  - EDP SCIENCES S A
SN  - 14320746
KW  - galaxies: peculiar
KW  - galaxies: elliptical and lenticular
KW  - galaxies: individual: NGC 3923
KW  - galaxies: photometry
KW  - techniques: image processing
KW  - gravitation
N2  - Context. The elliptical galaxy NGC3923 is known to be surrounded by a number of stellar shells, probable remnants of an accreted galaxy. Despite its uniqueness, the deepest images of its outskirts come from the 1980s. On the basis of the modified Newtonian dynamics (MOND), it has recently been predicted that a new shell lies in this region. Aims. We obtain the deepest image ever of the galaxy, map the tidal features in it, and search for the predicted shell. Methods. The image of the galaxy was taken by the MegaCam camera at the Canada-France-Hawaii Telescope in the g'-band. It reached the surface-brightness limit of 29 mag arcsec(-2). In addition, we reanalyzed an archival HST image of the galaxy. Results. We detected up to 42 shells in NGC3923. This is by far the highest number among all shell galaxies. We present the description of the shells and other tidal features in the galaxy. A probable progenitor of some of these features was discovered. The shell system likely originates from two or more progenitors. The predicted shell was not detected, but the new image revealed that the prediction was based on incorrect assumptions and poor data.
ER  -

BILEK, Michal, JC. CUILLANDRE, S. GWYN, Ivana EBROVA, Kateřina BARTOŠKOVÁ, Bruno JUNGWIERT and Lucie JÍLKOVÁ. Deep imaging of the shell elliptical galaxy NGC3923 with MegaCam. \textit{ASTRONOMY \&{} ASTROPHYSICS}. LES ULIS CEDEX A: EDP SCIENCES S A, 2016, vol.~588, April, p.~''nestrankovano'', 12 pp. ISSN~1432-0746. Available from: https://dx.doi.org/10.1051/0004-6361/201526608.

Detailed Information on Publication Record